说明：The program realization of phase-locked loop, operating environment for matlab, the second-order loop filterDQD

说明：A simulation of PLL using MS EXCEL..... very handy contains 3rd order as well as 4th order PLL simulations and is presented in a very easy to understand manner.

说明：Sample PLL 3rd order Code

说明：pll programs for 2nd , 3rd 4th order